Hardening in thermally-aged Fe-Cr binary alloys: Statistical parameters of atomistic configuration

Tomoaki Suzudo, Yasuyoshi Nagai, Daniel Schwen, Alfredo Caro

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

By exploiting Monte Carlo methodology and molecular dynamics, we computationally simulate the spinodal decomposition of iron-chromium binary alloys and analyze the relationship between the increase of yield strength induced by the phase separation phenomenon, and statistical parameters of the atomistic configuration. We successfully model the experimentally-discovered proportional relationship between the hardness and the variation parameter (or V), and also found that the adequacy of the parameter V as an empirical indicator of hardening is limited, because it does not properly capture short-range atomistic configurations that influence the hardening. We suggest that the short-range-order parameter has more potential to become universal descriptor of the phenomenon.

Original languageEnglish
Pages (from-to)116-122
Number of pages7
JournalActa Materialia
Volume89
DOIs
Publication statusPublished - 2015 May 1

Keywords

  • Hardening
  • Iron-chromium alloy
  • Molecular dynamics
  • Spinodal decomposition
  • Thermal aging

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Polymers and Plastics
  • Metals and Alloys

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